Design And Optimization Of Environment Monitoring System For Telescope Based On Wireless Sensor Network

The multi-channel birefringent filter,which is designed to improve the ability to observe the monochromatic property of the Sun,is regarded as an important instrument for solar magnetic field observation.The refractive index of the birefringent crystal of the optical filter is sensitive to temperature.Therefore,a high-precision multi-point temperature measurement system is to be designed to control the environment to ensure that the filter is working at constant temperature.Moreover,there are many cables such as the power lines in the wired charging system,which has an adverse effect on the accuracy.In order to solve the above problems,combining with practical needs,the key technologies involved in the environment monitoring system for telescope based on wireless sensor network are studied and designed in detail.The main contents of this paper include the following four aspects:(1)On the basis of the analysis of the bridge circuit and the improved V-1 circuit,another improved V-2 circuit is designed.The relative error of the improved V-2 circuit is from-0.0185? to + 0.0186?,which is the smallest.(2)Based on the new ADP5091,a novel scheme of the wireless charging is promoted and verified through the ADP5091 evaluation board.And the wireless charging module is designed.5V voltage was inputted at the transmitter,totally 19.2mV power was received.(3)The improved V-1 circuit is identified in Beijing Institute of Metrology and Testing.The results show that the temperature measurement accuracy can reach to±0.02?.The system can realize high precision temperature measurement for filter of the telescope.(4)The system is used to complete the multi point temperature measurement after the experimental platform is set up,and the stability of the system is to be tested.The results show that the system can run continuously for 145 days without failure,which can meet the real requirement.Finally,the problems encountered in the research are analyzed and summarized,and the future research of the subject is prospected.